Change absolute paths to relative paths

Love your videos man!

I have tried to build your project and when moving the “_site” folder
to my localhost none of the images will load as you are using the
absolute path to the root directory.

So I suggest a little change:

From:	/assets/img/#{$logo-path}
To:	       ../img/#{$logo-path}

Keeping things relative to the folder structure will work for both
development and deployment. I know it looks like I’ve changed a lot but
actually I only removed a few “/” in most of the cases.

Looking forward to your next video :D
Merge remote-tracking branch 'upstream/master'
Added latest changes from upstream
Updated change absolute paths to relative paths

Fixed conflicts and typo in work/proj-3.md
Merge pull request #33 from beRoberto/master

Thanks Roberto!!